The TPS51117 device is a cost-effective, synchronous buck controller for POL voltage
regulation in notebook PC applications. The controller is dedicated for the operation of the
Adaptive On-Time D-CAP mode. This mode provides ease-of-use, low external component count, and fast
transient response. Auto-skip mode for high efficiency down to the milliampere load range, or
PWM-only mode for low-noise operation is selectable.
The current-sensing scheme for positive overcurrent and negative overcurrent protection
is loss-less low-side RDS(on) sensing plus temperature compensation. The
device receives a 5-V (4.5 V to 5.5 V) supply from another regulator such as the TPS51120 or TPS51020. The conversion input
can be either VBAT or a 5-V rail, ranging from 1.8 V to 28 V, and the output voltage range is from 0.75 V to 5.5 V.
The TPS51117 is available in a 14-pin VQFN or a 14-pin TSSOP package and is specified
from 40°C to 85°C.
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